Since angles 1 and 2 are vertical angles, they are equal. Therefore, you can set their measures equal to each other. Given that:
- \( m∠1 = 106° \)
- \( m∠2 = (3x - 75)° \)
You can write the equation as:
\[ 106° = (3x - 75)° \]
To isolate \( x \), you could rearrange it. However, from the provided options, the most straightforward related equation that leads towards solving for \( x \) is:
\[ 3x° - 75° = 106° \]
This is the second response option.